Artificial tooth



Patented May 2, 1922.-

To all whom t `may concern:

vin ordinary use.

uNiTED STATES liff/ifiENT carica.A

EDWARD J. xocHMIr, or CLEVELAND, onro.

ARTIFICIAL' Toorn.

Be it known that I, EDWARD lrKo'oHMlT, a citizen of the United States, residing at Cleveland, in the'county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Artificial Teeth, of which the following is a specification.

This invention relates to artificial teeth, and particularly to crown and pivot teeth, the object beingk to provide an improved porcelain shell or porcelain jacket crown suitable for dental use and superior in many respects to the gold or other metal crowns Porcelain is superior to gold or other metal for various reasons, one

of which is that it presents a more natural appearance, and another is that it is notV liable to cause inflammation. Furthermore, by means of the present invention a shell crown is provided that is interchangeable, and that can be used for a soldering abutment in bridge work. OtherV advantages will appear to those skilled in the profesy* Several forms of the invention are illus-v trated in the accompanying drawings in vwhich Figure 1 is a Vfront view, partly in section, of incisors constructed according to the invention. Fig. 2 is a similar view. Fig. 3 is a section of one of the shells. vFig. 4 is an elevation, partly in section, showing a molar, and also illustrating the manner of connecting a bridge. Fig. 5 yis a section of a molarprepared for the shell. Fig. 6 is a section of the shell to bevapplied to the part shown in Fi. 5.V

Referring specifically to the drawings, 6 indicates a hollow porcelain tooth, shell, or crown, which may be molded in any suitable form and in various shades of color, according tothe demands of the stock, and within Veach shell is a tube 7 secured in the hollow thereof by suitable means, such as cement indicated at 8. This tube is made of gold or high fusing alloy, and will be of a Vproper.

size and shape to agree with the size and n lshape of the tooth of which it forms a part.

The tube 7 is preferably Vclosed atthe end within the tooth. Fig. 3 shows a sample shell for an incisor and Fig. 6 for a molar,

of an inner tube 9 which,V after the crown- 'Specificationu of Letters Patent.

be prepared or Patented May 19722.

Apeucaupa fiiginovmber a, i921. sensing. 5,172,210.

ofthe natural tooth has been properly prepared as shown in Fig. 2, isswa'ged over the stump and secured thereto by means. of cement oranyl other suitable way.:` The size of the tube or attaching member 9 is such that it will fit closely within lthe tube 7 when the shell is applied, entering within the tube 7 of said shell when the latter is set in place, as illustrated in Fig. l. Figs. 2 and 5 show stumps of the natural teeth provided with the tube 9 preparatory to receiving the.cor responding shells. This tube or attaching member 9 will also preferably be made of gold or suitable alloy, and the shell will be fixed thereto by means of a soldering compoundintroduced between the two tubes 7 and 9 when the artificial toothv is set in place. pound' may benplaced in the tube 7 when the parts are'pressed together, and it will be understood that the' -telescoping tubes will ground to a nice fit before setting. l y Y In the event of the breakage of a shell it can be quite readily removed anda new one substituted, by fitting it on the tube 9 which is secured to the stump of the natural tooth.

Another important advantage of the preslent construction exists in connection with dental bridge work, and is illustrated in Fig. et. The shell maybe used as an abutment for the bridge by cutting or grinding away a partof the porcelain jacket sufficient to expose the tube in said shell or jacket, and then soldering the bridge plate 10 to the tube 7 with the end of the bridge plate within said recess as yis clearly shown in Fig. 4. This vfigure shows a bridge extending between two of the artificial teeth described, with two teeth l1 mounted onv the plate. This provides-a very effective and convenient bridge connection, and eliminates bending. Y

It isy intended that the manufacturer will make up the porcelain shells with the enclosed tube, and the dentist may then select a tooth of the proper size an color, and apply it to an attachingftube made by himself and fitted to the stump of the natural tooth and to which the shell can be applied very quickly and easily. Preferably the inner and outer tubes yshould be slightly to facilitate the removal of the shell in case it should be broken. I

A drop or two of soldering comy i tapered so as to provide a wedge fit and also A i i -llO Thevadvantages ,derived from this method ofV aflixing artificial teeth will be readily recognized by the dental profession, it not only saves time and labor, but artificial teeth so allixed will present a very natural appearance in the mouth of the wearer",` and therein, of a bridge plate fitting vat its end in VsaidV recess and secured to saidytubef-l they Will be durable.

Iclaim: v

l. An artificial tooth comprising a hollow vitreous crown, and telescoping tubes'tting within the same, one ofthe tubes being attached tojthe crown and theotherto a natural toothl l, 2. An artificial tooth comprising a hollow tube adapted be xed'ow'fer and 15 3. The combina-tion withl an Yartilicial tooth hayingan outer'vitreous shell andan' inner v metal tube, said shell having a recess cut 20 In testimony hereof, I affix my signature in presence of two' Witnesses.

Y .EDWARD J. e Y Witnesses; i

JQHN

A, BorrMHAiiDg-f ,Y BEssIE PoLraaK. I 

